阅读说明：本技术 一种含有植物提取物的埃米生物质防腐剂及其制备方法 (Plant extract-containing angstrom biomass preservative and preparation method thereof ) 是由 钟威 于 2021-08-27 设计创作，主要内容包括：本发明属于缓蚀剂技术领域,具体涉及一种含有植物提取物的埃米生物质防腐剂及其制备方法；所述防腐剂包括以下组分：海藻提取物、白杨树叶提取物、连香树叶提取物、水青树叶提取物、香果树叶提取物、杏树提取物、助剂和水；制备方法如下：将各主要成分提取物粉碎、均匀后进行陈化,陈化完成后再与助剂和水混合均匀；本申请中的各种植物提取物与助剂协同可以起到很好的耐腐蚀作用,各物质中的活性基团,尤其是提取物中带负电荷的极性基团可通过化学吸附作用吸附在带正点的金属表面,通过界面转化、缩聚、螯合作用下形成保护膜,在提取过程中,采用的超临界萃取等方法可以有效避免极性基团被破坏从而有效保证了提取物的性能,所使用的助剂中也含有大量可与提取物中活性成分结合的基团,能有效提高产品的耐腐蚀性能。(The invention belongs to the technical field of corrosion inhibitors, and particularly relates to an angstrom biomass preservative containing plant extracts and a preparation method thereof; the preservative comprises the following components: seaweed extract, poplar leaf extract, oriental paperbush leaf extract, Chinese ivy leaf extract, Chinese eaglewood leaf extract, apricot tree extract, auxiliary agent and water; the preparation method comprises the following steps: pulverizing the main component extracts, uniformly aging, and uniformly mixing with auxiliary agents and water after aging; in the application, various plant extracts and auxiliaries cooperate to play a good corrosion-resistant role, active groups in various substances, particularly polar groups with negative charges in the extracts can be adsorbed on the metal surface with positive points through the chemical adsorption effect, and a protective film is formed under the effects of interface conversion, polycondensation and chelation.)

1. An angstrom biomass preservative containing plant extracts, characterized by: the paint comprises the following components in percentage by weight:

2. the plant extract-containing ehmitis biomass preservative according to claim 1, wherein: the poplar leaf extract is prepared by heating and refluxing crushed dry poplar leaves, refluxing for 1-3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain a poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 1-3 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 1-3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 1-3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

3. The plant extract-containing ehmitis biomass preservative according to claim 1, wherein: the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared by the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 1-5% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 40-60 ℃, controlling the pressure in the extraction device to be 50MPa, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

4. The plant extract-containing ehmitis biomass preservative according to claim 3, wherein: the apricot leaf extract is prepared from apricot trees of Hongbing town of Shennongjia region.

5. The plant extract-containing ehmitis biomass preservative according to claim 1, wherein: the auxiliary agent is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight part ratio is 1:1.5: 0.5.

6. A preparation method of an angstrom biomass preservative containing plant extracts is characterized by comprising the following steps: the method comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 12-36 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

7. The method of preparing an angstrom biomass preservative containing plant extracts as claimed in claim 6, wherein: in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the fragrant fruit tree leaf extract and the apricot extract is 200-400 meshes.

8. The method of preparing an angstrom biomass preservative containing plant extracts as claimed in claim 6, wherein: the aging temperature in the step 1 is 18-36 ℃.

9. The method of preparing an angstrom biomass preservative containing plant extracts as claimed in claim 7, wherein: and 2, ultrasonic stirring is adopted.

Technical Field

The invention belongs to the technical field of corrosion inhibitors, and particularly relates to an angstrom biomass preservative containing plant extracts and a preparation method thereof.

Background

There are many methods for protecting metals, and the method for protecting metals by using corrosion inhibitors has a broad prospect due to the characteristics of small dosage, quick response, wide sources, strong applicability and the like. The types of corrosion inhibitors are classified according to the classification method: the corrosion inhibitor can be divided into an inorganic corrosion inhibitor and an organic corrosion inhibitor according to the physical properties of the corrosion inhibitor; they can be classified into acid corrosion inhibitors, neutral corrosion inhibitors and alkaline corrosion inhibitors according to the type of medium used. Earlier corrosion inhibitors were studied as inorganic corrosion inhibitors based on chromates, mercury salts, etc., but with the development of corrosion inhibitors, the use of such toxic, harmful inorganic corrosion inhibitors is decreasing.

The common pickling corrosion inhibitor mainly comprises an inorganic corrosion inhibitor containing toxic chromate, organic phosphorus, nitrogen, oxygen, sulfur and derivatives thereof, such as imidazoline and salts thereof, quaternary ammonium salts, rosin derivatives, sulfonate, imine acetic acid derivatives, alkynol and the like. Although the nitrogenous corrosion inhibitor has good corrosion inhibition effect, most of the nitrogenous corrosion inhibitors are heterocyclic compounds, so that the nitrogenous corrosion inhibitors have high toxicity and can cause great damage to human bodies and natural environment.

For example, the Chinese patent with publication number CN105503855B discloses a preparation method of thiazole carbon steel pickling corrosion inhibitor, which comprises the steps of firstly, synthesizing a first-step intermediate by using cyanuric chloride as a parent and n-octylamine containing a hydrophobic group as a nucleophilic reagent; then 2-mercaptobenzothiazole is used as a nucleophilic reagent to synthesize an intermediate in the second step; and finally, synthesizing a target product, namely the thiazole corrosion inhibitor with surface activity, by using N, N-dimethyl-1, 3-propane diamine containing hydrophilic groups as a nucleophilic reagent. The invention discloses a preparation method of thiazole carbon steel pickling corrosion inhibitor, which introduces surfactant into benzothiazole to synthesize the carbon steel pickling corrosion inhibitor with surface activity, thereby improving the water solubility of the benzothiazole, improving the corrosion inhibition performance and reducing the consumption of the corrosion inhibitor.

However, the above patents have the following problems: in the preparation process of the patent, a large amount of raw materials such as toluene, acetone and the like which are easy to pollute the environment are used, so that the environment is easy to pollute.

Disclosure of Invention

The first purpose of the invention is to provide an angstrom biomass preservative containing plant extracts, and provide a biomass metal preservative with higher corrosion inhibition and corrosion prevention effects; the second purpose of the invention is to provide a preparation method of the angstrom biomass preservative containing the plant extract, which solves the problem that the existing product uses a large amount of raw materials polluting the environment in the preparation process.

The first object of the present invention is achieved by:

the invention relates to an angstrom biomass preservative which comprises the following components in percentage by weight:

in order to obtain a product with more excellent performance, the poplar leaf extract is prepared by heating and refluxing crushed dry poplar leaves for 1-3 hours at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the poplar leaf extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 1-3 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 1-3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 1-3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

By using absolute ethyl alcohol as an extraction solvent and adopting a heating reflux extraction method, various active substances in the raw materials can be better obtained, so that a more excellent effect is achieved.

In order to obtain a product with more excellent performance, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared by the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 1-5% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 40-60 ℃, controlling the pressure in the extraction device to be 50MPa, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The ethyl acetate is added as an entrainer in the extraction process, so that the solubility of active substances in the apricot leaves in a solvent can be improved, and the extraction efficiency is improved; and the relatively low-temperature carbon dioxide supercritical extraction can also effectively avoid the inactivation or decomposition of the active substances at a higher temperature to influence the effect of the product.

In order to obtain a product with more excellent performance, the apricot leaf extract raw material is red lawn apricot trees produced in red lawn town of Shennongjia region.

In order to obtain a product with more excellent performance, the invention also provides a preparation method of the angstrom biomass preservative containing the plant extract, which comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 12-36 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

By fully crushing the seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the aquilaria sinensis leaf extract, the myrtle leaf extract and the apricot extract, the mixing efficiency of each component can be effectively improved, and each component is fully dispersed.

In order to better improve the dispersion efficiency, the particle size of the crushed seaweed extract, poplar leaf extract, oriental paperbush leaf extract, water tree leaf extract, myrcia leaf extract and apricot extract in the step 1 is 200-400 meshes.

For better aging, the aging temperature in step 1 is 18-36 ℃.

In order to mix the materials thoroughly, ultrasonic agitation is adopted in the step 2.

Advantageous effects

Compared with the prior art, the invention has the beneficial effects that:

the corrosion inhibitor has good corrosion inhibition effect in a strong corrosion environment, and the corrosion inhibition efficiency can reach 91.17% at most under a strong acid condition; meanwhile, the corrosion resistance of the cement can be well achieved under the condition that the cement is corroded by chloride, and the corrosion resistance of the product can be effectively improved as can be known from comparative examples and comparative examples, various plant extracts and auxiliaries in the corrosion resistance agent can achieve a good corrosion resistance effect synergistically, active groups in various substances, particularly polar groups with negative charges in the extracts can be adsorbed on metal surfaces with positive points through a chemical adsorption effect, and a protective film is formed under the effects of interface conversion, polycondensation and chelation.

Detailed Description

The invention is further described with reference to specific examples.

Example 1

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 3h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 1 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 1h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

According to the angstrom biomass preservative containing plant extracts, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared through the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 5% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 40 ℃, controlling the pressure in the extraction device to be 50MP a, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative with the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 12 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

In the preparation method of the angstrom biomass preservative containing plant extracts, in the step 1, the crushed particle size of the seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 400 meshes.

In the preparation method of the angstrom biomass preservative containing plant extracts, the aging temperature in the step 1 is 18 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Example 2

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 1h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 3 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves by an extraction method, refluxing for 1h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

According to the angstrom biomass preservative containing plant extracts, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared through the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 3% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 4 ℃, controlling the pressure in the extraction device to be 50MP a, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 36 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 200 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 36 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Example 3

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 2h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 2 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 2 hours at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 2h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

According to the angstrom biomass preservative containing plant extracts, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared through the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 3% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 50 ℃, controlling the pressure in the extraction device to be 50MP a, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 24 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 300 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 24 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Example 4

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 1h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 1 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves by an extraction method, refluxing for 1h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 1h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

According to the angstrom biomass preservative containing plant extracts, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared through the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 5% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 40 ℃, controlling the pressure in the extraction device to be 50MP a, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 12 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 200 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 18 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Example 5

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 3h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 3 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 3h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

According to the angstrom biomass preservative containing plant extracts, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared through the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 2% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 60 ℃, controlling the pressure in the extraction device to be 50MP a, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 24 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 300 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 36 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Comparative example 1

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 2h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 2 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 2 hours at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 2h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

In the above angstrom biomass preservative containing plant extracts, the apricot tree extract is red plateau apricot bark extract, and the red plateau apricot bark extract is prepared by the following steps:

putting the dried red plateau apricot tree bark into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 3% of the red plateau apricot tree bark into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 50 ℃, controlling the pressure in the extraction device to be 50MPa, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 24 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 300 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 24 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Comparative example 2

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 2h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 2 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 2 hours at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 2h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

In the above angstrom biomass preservative containing plant extracts, the apricot extract is red plateau apricot pulp extract, and the red plateau apricot pulp extract is prepared by the following steps:

putting dried red plateau apricot pulp into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 3% of the red plateau apricot pulp into the extraction device, then utilizing a booster pump and a preheater to enable carbon dioxide to reach a critical state and sending the carbon dioxide into the extraction device, wherein the flow rate of the supercritical carbon dioxide is 25L/h, the temperature in the extraction device is controlled to be 50 ℃, the pressure in the extraction device is 50MPa, and the extraction time is 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a folium aquilariae extract, a myrtle leaf extract and an apricot extract, transferring to a container, adding water, stirring uniformly, and aging for 24 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 300 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 24 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Comparative example 3

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 2h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 2 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 2 hours at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 2h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

The assistant is nicotinic acid, 5-nitroindole and 1, 3-dimethyl-2-imidazolidinone, and the weight portion ratio is 1:1.5: 0.5.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing a seaweed extract, a poplar leaf extract, a folium cinnamomi japonici extract, a water tree leaf extract and a myrobalan leaf extract, transferring to a container, adding water, stirring uniformly, and aging for 24 hours;

s2, adding the auxiliary agent into the product aged in the step 1, and uniformly stirring again to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the Chinese ash leaf extract and the Chinese gooseberry leaf extract is 300 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 24 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Comparative example 4

An angstrom biomass preservative containing plant extracts comprises the following components in percentage by weight:

in the above Ehrlichia rice biomass preservative containing plant extract, the poplar leaf extract is a crushed dried poplar leaf, and is subjected to reflux extraction by heating reflux extraction method at 80 ℃ for 2h by using absolute ethyl alcohol as a solvent, and then subjected to vacuum filtration to obtain the poplar extract;

the folium Nerii extract is prepared by heating and reflux-extracting crushed dried folium Nerii with anhydrous ethanol as solvent at 80 deg.C for 2 hr, and vacuum filtering to obtain folium Nerii extract;

the water tree leaf extract is prepared by heating and refluxing crushed dry water tree leaves for 2 hours at 80 ℃ by using absolute ethyl alcohol as a solvent, and then carrying out vacuum filtration to obtain the water tree leaf extract;

the myrtle leaf extract is prepared by heating and refluxing crushed dry myrtle leaves, refluxing for 2h at 80 ℃ by using absolute ethyl alcohol as a solvent, and then performing vacuum filtration to obtain the myrtle leaf extract.

According to the angstrom biomass preservative containing plant extracts, the apricot extract is an apricot leaf extract, and the apricot leaf extract is prepared through the following steps:

putting dried apricot leaves into a supercritical carbon dioxide extraction device, adding ethyl acetate with the mass of 3% of that of the apricot leaves into the extraction device, enabling carbon dioxide to reach a critical state by utilizing a booster pump and a preheater, sending the carbon dioxide into the extraction device, controlling the flow rate of the supercritical carbon dioxide to be 25L/h, controlling the temperature in the extraction device to be 50 ℃, controlling the pressure in the extraction device to be 50MP a, and controlling the extraction time to be 6 hours; the carbon dioxide fluid in the extraction device is slowly released by adjusting the drain valve, and the carbon dioxide fluid is resolved and separated by the separator.

In the angstrom biomass preservative containing plant extracts, the apricot leaf extracts are prepared from the red lawn apricot trees produced in the town of red lawn of Shennongjia region.

The preparation method of the angstrom biomass preservative containing the plant extract comprises the following steps:

s1, smashing the seaweed extract, the poplar leaf extract, the isodon leaf extract, the aquilaria sinensis leaf extract, the myrtle leaf extract and the apricot extract, transferring the smashed extracts into a container, adding water, stirring uniformly, and aging for 24 hours to obtain a finished preservative.

The preparation method of the angstrom biomass preservative containing the plant extract,

in the step 1, the particle size of the crushed seaweed extract, the poplar leaf extract, the oriental paperbush leaf extract, the water tree leaf extract, the myrtle leaf extract and the apricot extract is 300 meshes.

The preparation method of the angstrom biomass preservative containing the plant extract,

the aging temperature in step 1 was 24 ℃.

In the preparation method of the angstrom biomass preservative containing the plant extract, ultrasonic stirring is adopted in the step 2.

Examples of the experiments

First, slow release rate test

Corrosion inhibition performance tests were performed on the preservatives prepared in the examples and comparative examples:

the specific test method is as follows:

1. sample preparation: washing 300mm × 30mm × 1.5mm iron sheet with anhydrous ethanol, cutting into equal-length 30mm × 30mm × 1.5mm iron sheet, and grinding to equal weight to 0.1 mg;

2. solution preparation: preparing 10 parts of 1mol/LHCL solution, injecting products of each example and comparative example accounting for 2.5 percent of the mass of the solution into the HCL solution, and injecting purified water accounting for 2.5 percent of the mass of the solution into the redundant group to serve as blank control;

3. always detecting: 10 groups of samples are respectively suspended and immersed in the HCL solution for 12 hours, and after the suspension is finished, the samples are taken out, dried and weighed.

The corrosion inhibition rate calculation formula is as follows:

in the formula: m-mass loss of specimen, g;

m₀-mass loss value, g, of the coupon pickling blank;

8760- -hours equivalent to 1 year, h/a

10- -millimeter number equivalent to 1cm, mm/cm

s- -surface area of test piece, cm 2;

rho- -density of the coupon, 7.85g/cm 3;

t-test time, h;

the calculation formula of the slow release rate is as follows:

X＝(△G₀-△G₁)/△G₀

△G₀- -Corrosion Rate of blank solution

△G₁Corrosion rates for the examples and comparative examples

Second, concrete corrosion test

Concrete test pieces are formed according to the specification in the anti-freezing test (single-sided freeze-thaw method) in GB/T50082-2009 Standard test method for Long-term Performance and durability of ordinary concrete, and the statically-cured concrete blocks are immersed in 3 wt% sodium chloride solution, wherein 9 groups of sodium chloride solution are injected with each of the products of examples and comparative examples accounting for 2.5% of the solution mass, and the rest group is injected with purified water accounting for 2.5% of the solution mass as a blank control. Freezing at-20 deg.C for 3 hr, thawing at 10 deg.C for 1 hr, repeatedly thawing for 30 days, weighing the concrete block, and calculating the concrete corrosion rate according to the mass loss.

Group of	Sustained release rate (%)	Concrete corrosion Rate (%)
			Example 1	88.21	0.97
Example 2	87.36	0.62
			Example 3	82.13	0.71
Example 4	91.17	0.88
			Example 5	83.21	0.77
Comparative example 1	76.24	1.53
			Comparative example 2	63.17	1.62
Comparative example 3	31.17	3.22
			Comparative example 4	43.28	2.68
Control group	0	6.23

TABLE 1

As shown in Table 1, the corrosion inhibitor prepared in the embodiment 1-5 has good corrosion inhibition effect under strong corrosion environment, and the corrosion inhibition efficiency can reach 91.17% at most under strong acid condition; meanwhile, the corrosion resistance of the cement can be well achieved under the condition that the cement is corroded by chloride, and the corrosion resistance of the product can be effectively improved as can be known from comparative examples and comparative examples, various plant extracts and auxiliaries in the corrosion resistance agent can achieve a good corrosion resistance effect synergistically, active groups in various substances, particularly polar groups with negative charges in the extracts can be adsorbed on metal surfaces with positive points through a chemical adsorption effect, and a protective film is formed under the effects of interface conversion, polycondensation and chelation.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.